Refrigeration apparatus



Feb. 19, 1935.

G. A. 'LEYNER 4 REFRI GERATI ON APPARATUS Filed April 5, 1934 2 Sheets-Sheet 1 F' 16;. 3. WITNESSES:'

INVENTOR GEORGE H. LEYNER ATTO EY Feb. 19, 1935,

G. A. LEYNER REFRIGERATION APPARATUS Filqd April 5, 1934 2 Sheets-Sheet 2 INVENTAOR GEORGE H. LEYNER FIG-'6.

Patented Feb. 19, 1935 v UNITED STATES PATENT-OFFICE T REFRIGERATION APPARATUS .George A. Leyn'er, Springfield, Mass., assignor to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa, a corporation of Pennsylvania Application April 5, 1934, Serial No. 719,102

7 Claims. (Cl. 62-126) My invention relates to refrigeration apparatus opposite end of the sheet from the'header 4 and and particularly to an evaporator for refrigeraat 9 and 10, intermediately of the sheet 1, the tion apparatus of the mechanical type. manifolds 8, 9, and 10 extending parallel to the It is an object of my invention to provide an imheader 4. Distributing manifolds 11 and 12 are proved evaporator of the welded sheet metal type. formed in the trapezoidal portions 5 and .6 and 5 It is another object of my invention to provide extend transverse to the header 4. -Manifo1ds 8, a welded sheet metal evaporator which is inex- 9, and connect corrugations 3 and manifolds pensive to manufacture and which provides for 11 and 12 connect corrugations 7 in both traperapid freezing of ice cubes and desserts. zoidal portions 5 and 6. Passageways 11a and 10 It is still another object of the invention to 12a provide for connecting manifolds 11 and 12, 10

provide an evaporator wherein not more than respectively, with the header 4 and corrugatwo sheets of metal need be utilized but where'- tions 3. in the evaporator freezing chamber is enclosed The inner wall 2 is formed from a flat sheet of on five sides thereof, the front being left open for metal of the same shape as the sheet 1. Reen- 15 access thereto. forcing corrugations 13 are formed on the flat l5 It is another object of my invention to substansheet for a purpose hereinafter described. tially conceal the inlet and outlet conduits for After the sheets 1 and 2 are properly stamped, the evaporator. the sheet 1 is bent upwardly on the line of the It is a further object of my invention to provide manifold 9 and then obliquely forward on the line an improved header construction and baflle thereof the manifold 10. The sheet is thus bent in a 20 for. U-shaped form. The trapezoidal portions 5 and 6 These and other objects are effected by my inare then bent downwardly to form side walls for vention as will be apparent from the following declosing the channel of the U-shaped form. The scription and claims, taken in connection with inner sheet 2 is likewise bent and is inserted in the accompanying drawings, forming a part of nested relation with the already bent sheet 1. 25 this application, in which: The corrugations 13 register with the open side Fig. 1 is a vertical section of the evaporator of the header portion 4. A baflle member 15 is constructed in accordance with my invention; disposed in the header 4 and a suction tube 14 Fig. 2 is a plan view of the outer flat evaporator extends through the header 4 and the batlle 15 as sheet before bending; shown in Fig. 1. .The two sheets are then preferto Fig. 3 is a sectional view of the flat sheet taken ably welded at their meeting edges and between on line IIIIII of Fig. 2; the corrugations 3 and '7.

Fig. 4 is a sectional view of the flat sheet taken After welding, a refrigerant inlet tube 16 is on line IV--IV of Fig. 2; soldered or brazed as shown at 17. The manifolds Fig. 5 is a plan view of the inner flat evaporator 8, 9, 10, and 11 connect the corrugations 3 and 7 335 sheet beforebending; and, and ensure flow of refrigerant vapor to the header Fig. 6 is a sectional view of the inner sheet 4. The corrugations 13 on the inner .sheet metal taken on line V'I-VI of Fig. wall 2 reenforce the wall at the header.

Referring specifically to the drawings for a de- From the foreg it W be pp that I 40 tailed description of my invention, numeral 1 have provided a five-sided sheet metal evapora- 40 designates the outer sheet of the evaporator and tor which is formed from not more than two numeral2the inner sheet of the evaporator. The sheets of metal. The header conceals the reouter sheet, as shown in Fig. 2, is formed substanfri ra t inl t a d ut conduits, n an ice tray tially flat and is provided with downwardly- 8 sts on a refrigerated portion of t s d stamped corrugations 3 extending longitudinally v p to by'q freezing is Obtained. 45 thereof. A half-circular header member 4 is The evaporator is inexpensive to manufacture, stamped at one end of the sheet, the corrugabeing well adapted for large production methods. tions 3 communicating therewith. Trapezoidal While I have shown my invention in but one shaped sheet metal portions 5 and 6 are provided form, it will be obvious to those skilled in the art at the edges of the flat sheet transverse to the that it is not so limited, but is susceptible of variheader and at the header end. Corrugations '7 Gus changes and modifications without departing are formed in the portions 5 and 6, which corrufrom the spirit thereof, and I desire, therefore, gations extend perpendicular to the corrugathat only such limitations shall be placed theretions 3. upon as arelimposed by the prior art or as are Distributing manifolds are formed at 8 at the specifically set forth in the appended claims.

What I claim is:

1. A refrigerant containing evaporator for a mechanical refrigerator comprising adjacent nested sheet metal walls, one of which is provided with corrugations, said walls being welded together at their meeting edges and between the corrugations, whereby refrigerant passages are formed therein, inlet means for conveying refrigerant to the passages, outlet means for conveying vaporized refrigerant from all the passages, said walls being bent to form a five-sided freezing compartment having an open access end, all of the sides of said freezing compartment containing refrigerant.

2. A refrigerant containing evaporator for a refrigerator comprising an inner and an outer sheet metal wall, said outer wall before bending being formed in the shape of a rectangle with a header portion at one end thereof and a plurality of corrugations connecting with said header portion, outwardly-extending portions formed on one end of the rectangle adjacent the header portion and on opposite edges thereof, corrugations formed in the outwardly-extending portions and extending perpendicularly to the aforesaid corrugations, manifold means for connecting both sets of corrugations together, said outer wall being bent to substantially U-shape and the outwardly-extending portions being bent to close the channel of the U-shape thus formed, said inner sheet being symmetrical with the outer wall and being bent in the same manner, said inner and outer wall being disposed in nested relation, and means for fastening the sheets adjacent their meeting edges and between the corrugations.

3. An evaporator as claimed in claim 2 wherein eervea the inner wall is provided with corrugations in the portion thereof adjacent the header portion of the outer wall when the walls are disposed in nested relation.

4. A refrigerant containing evaporator for a mechanical refrigerator comprising adjacent nested sheet metal walls, one of which is provided with corrugations, said walls being Welded together at their meeting edges and between the corrugations, whereby refrigerant passageways are formed therein, inlet means for conveying refrigerant to the passageways, header means for connecting the refrigerant passageways at their outlets, and outlet means for conveying vaporized refrigerant from the header, said walls being bent to form a five-sided freezing compartment having an open access end, all of the sides of said freezing compartment containing refrigerant.

5. An evaporator as claimed in claim 4 wherein refrigerant outlet means is disposed in back of the header.

6. An evaporator as claimed in claim 4 wherein the refrigerant inlet and outlet means are disposed in back of the header.

7. A refrigerant containing evaporator for a mechanical refrigerator comprising adjacent nested sheet metal walls, said walls being welded together to form a refrigerant containing chamber, inlet means for conveying refrigerant to said chamber, and outlet means for conveying vaporized refrigerant from said chamber, said walls being bent to form a five-sided freezing compartment having an open access end, all of the sides of said freezing compartment containing refrigerant,

GEORGE A. LEYN'ER. 

